mirror of
https://github.com/lovell/sharp.git
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112 lines
4.7 KiB
Markdown
112 lines
4.7 KiB
Markdown
# Performance
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A test to benchmark the performance of this module relative to alternatives.
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Greater libvips performance can be expected with caching enabled (default)
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and using 8+ core machines, especially those with larger L1/L2 CPU caches.
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The I/O limits of the relevant (de)compression library will generally determine maximum throughput.
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## Contenders
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* [jimp](https://www.npmjs.com/package/jimp) v0.22.7 - Image processing in pure JavaScript.
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* [imagemagick](https://www.npmjs.com/package/imagemagick) v0.1.3 - Supports filesystem only and "*has been unmaintained for a long time*".
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* [gm](https://www.npmjs.com/package/gm) v1.25.0 - Fully featured wrapper around GraphicsMagick's `gm` command line utility.
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* [@squoosh/lib](https://www.npmjs.com/package/@squoosh/lib) v0.4.0 - Image libraries transpiled to WebAssembly, includes GPLv3 code, but "*Project no longer maintained*".
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* [@squoosh/cli](https://www.npmjs.com/package/@squoosh/cli) v0.7.3 - Command line wrapper around `@squoosh/lib`, avoids GPLv3 by spawning process, but "*Project no longer maintained*".
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* sharp v0.32.0 / libvips v8.14.2 - Caching within libvips disabled to ensure a fair comparison.
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## Environment
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### AMD64
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* AWS EC2 us-east-2 [c6a.xlarge](https://aws.amazon.com/ec2/instance-types/c6a/) (4x AMD EPYC 7R13)
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* Ubuntu 22.04 20230303 (ami-0122295b0eb922138)
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* Node.js 16.19.1
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### ARM64
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* AWS EC2 us-east-2 [c7g.xlarge](https://aws.amazon.com/ec2/instance-types/c7g/) (4x ARM Graviton3)
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* Ubuntu 22.04 20230303 (ami-0af198159897e7a29)
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* Node.js 16.19.1
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## Task: JPEG
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Decompress a 2725x2225 JPEG image,
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resize to 720x588 using Lanczos 3 resampling (where available),
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then compress to JPEG at a "quality" setting of 80.
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Note: jimp does not support Lanczos 3, bicubic resampling used instead.
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#### Results: JPEG (AMD64)
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| jimp | buffer | buffer | 0.84 | 1.0 |
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| squoosh-cli | file | file | 1.07 | 1.3 |
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| squoosh-lib | buffer | buffer | 1.82 | 2.2 |
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| gm | buffer | buffer | 8.41 | 10.0 |
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| gm | file | file | 8.45 | 10.0 |
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| imagemagick | file | file | 8.77 | 10.4 |
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| sharp | stream | stream | 36.36 | 43.3 |
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| sharp | file | file | 38.67 | 46.0 |
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| sharp | buffer | buffer | 39.44 | 47.0 |
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#### Results: JPEG (ARM64)
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| jimp | buffer | buffer | 1.02 | 1.0 |
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| squoosh-cli | file | file | 1.11 | 1.1 |
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| squoosh-lib | buffer | buffer | 2.08 | 2.0 |
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| gm | buffer | buffer | 8.80 | 8.6 |
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| gm | file | file | 10.05 | 9.9 |
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| imagemagick | file | file | 10.28 | 10.1 |
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| sharp | stream | stream | 26.87 | 26.3 |
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| sharp | file | file | 27.88 | 27.3 |
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| sharp | buffer | buffer | 28.40 | 27.8 |
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## Task: PNG
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Decompress a 2048x1536 RGBA PNG image,
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premultiply the alpha channel,
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resize to 720x540 using Lanczos 3 resampling (where available),
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unpremultiply then compress as PNG with a "default" zlib compression level of 6
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and without adaptive filtering.
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Note: jimp does not support premultiply/unpremultiply.
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### Results: PNG (AMD64)
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| squoosh-cli | file | file | 0.40 | 1.0 |
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| squoosh-lib | buffer | buffer | 0.47 | 1.2 |
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| gm | file | file | 6.47 | 16.2 |
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| jimp | buffer | buffer | 6.60 | 16.5 |
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| imagemagick | file | file | 7.08 | 17.7 |
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| sharp | file | file | 17.80 | 44.5 |
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| sharp | buffer | buffer | 18.02 | 45.0 |
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### Results: PNG (ARM64)
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| Module | Input | Output | Ops/sec | Speed-up |
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| :----------------- | :----- | :----- | ------: | -------: |
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| squoosh-cli | file | file | 0.40 | 1.0 |
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| squoosh-lib | buffer | buffer | 0.48 | 1.2 |
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| gm | file | file | 7.20 | 18.0 |
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| jimp | buffer | buffer | 7.62 | 19.1 |
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| imagemagick | file | file | 7.96 | 19.9 |
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| sharp | file | file | 12.97 | 32.4 |
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| sharp | buffer | buffer | 13.12 | 32.8 |
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## Running the benchmark test
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Requires Docker.
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```sh
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git clone https://github.com/lovell/sharp.git
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cd sharp/test/bench
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./run-with-docker.sh
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```
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